xkcd – Earth Temperature Timeline
When people say “the climate has changed before”, these are the kinds of changes they’re talking about.
xkcd
xkcd: 4.5 degrees
Without prompt, aggressive limits on CO2 emissions, the Earth will likely warm by an average of 4-5°c by the century’s end.
How big a change is that?
The media
The frequently brilliant xkcd on the state of the media.